Figure 3.

FRET histogram of H-Telo: A) unfolded state in the absence of K⁺, B) folded in F1 and F2 states upon addition of 10 mm K⁺, upon addition of tetramer 3 after C) 2 min and D) 20 min, E) upon addition of octamer 4 after 20 min, F) 30 min after removing free K⁺ and 4.